Perspective Box By Rickey Spiece Bally BASIC Manual, Pg. 115
Perspective Box, by Rickey Spiece, is from page 115 of the Bally BASIC Manual. This program was not included in the "AstroBASIC" version of the manual.
Perspective Box draws a "box" which is meant to have a pseudo 3D perspective in a corner of the screen. The program changes the color of the box and then "shrinks" it. The program is simple enough that it wasn't included in the manual for the re-release of Bally BASIC, but it probably helped early purchasers and users of the Bally Arcade go on to create video art.
Rickey Spiece worked on the original Bally Arcade back in the 1970s at Dave Nutting and Associates. According to the Bally/Astrocade Game Cartridge and Hardware FAQ, Rickey Spiece also programmed, or helped to program, numerous cartridges for the Bally Arcade, including:
Black Jack/Poker/Acey-Deucey - Written by Mason and finished by Rickey Spiece
Football - Written by Bob Ogden and Rickey Spiece
Grand Prix/Demolition Derby - Written by Bob Ogden, Rickey Spiece, and Scot L. Norris.
Panzer Attack/Red Baron - Written by Rickey Spiece.
Sea Wolf/Bombardier - Written by Rickey Spiece.
This video overview is broken into various sections:
0:00 - Perspective Box - Titles and Overview 2:11 - Perspective Box - Running 3:31 - Perspective Box - Program Listing 3:51 - End Credits
Perspective Box is very simple, but like all of the BASIC program included in the Bally BASIC manual, it helped to inspire programmers and fans to write their own programs, or to expand upon this program to learn about how Bally BASIC worked and could be used to make games, computer art, sound effects and music.